Abstract
The radial-type superconducting magnetic bearing (SMB) consists of the superconducting stator (SC stator) and the permanent magnet rotor (PM rotor). The rotation speed degradation of the PM rotor is one of the most significant problems for the practical use of SMB to the energy storage flywheel system. This phenomenon is thought to be caused by the eddy current in the PM rotor induced by the magnetic field of the SC stator which is inhomogeneous because the SC stator does not consist of a single superconductor bulk. In this research, the rotation speed degradation of 100 kW h flywheel was simulated by the 3-dimensional superconducting current simulation code.
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